Multimodal Validation Pipeline Report
| Subject: | sub-010 | Session: | ses-001 |
| Task: | fingertapping | Timestamp: | 2026-01-16T04:09:11.189943 |
Software Versions
- python: 3.11.14
- mne: 1.9.0
- numpy: 2.2.6
- scipy: 1.15.3
Experiment Quality Assurance
Recording duration and trial count validation for EEG and fNIRS modalities.
Recording Duration
| Modality | Duration (s) | Status |
|---|---|---|
| EEG | 1145.5s | â |
| fNIRS | 0.0s | â |
Valid Trials
| Modality | Valid Trials | Expected Trials | Percentage |
|---|---|---|---|
| EEG | 24 | 24 | 100.0% |
| fNIRS | 0 | 24 | 0.0% |
EEG Channel Quality (Raw Data Metrics)
| Channel | Amplitude Range (ÂĩV) | Std Dev (ÂĩV) | Mean Correlation |
|---|---|---|---|
| Fp1 | 13.05 | 0.07 | 0.319 |
| Fz | 13.11 | 0.15 | -0.186 |
| F3 | 13.20 | 0.33 | 0.306 |
| F7 | 13.33 | 0.33 | 0.311 |
| F9 | 13.32 | 0.28 | 0.316 |
| FC5 | 13.28 | 0.38 | 0.310 |
| FC1 | 13.27 | 0.43 | -0.282 |
| C3 | 13.20 | 0.13 | 0.352 |
| T7 | 13.38 | 0.13 | 0.362 |
| CP1 | 13.35 | 0.19 | 0.335 |
| Pz | 409.43 | 22.42 | 0.003 |
| P3 | 13.31 | 0.26 | -0.222 |
| P7 | 13.29 | 0.29 | -0.240 |
| P9 | 13.14 | 0.26 | 0.321 |
| O1 | 13.23 | 0.35 | 0.315 |
| Oz | 13.33 | 0.34 | 0.311 |
| O2 | 13.37 | 0.09 | -0.035 |
| P10 | 13.32 | 0.27 | 0.326 |
| P8 | 13.33 | 0.09 | 0.220 |
| P4 | 13.29 | 0.40 | 0.305 |
| CP2 | 13.51 | 0.26 | -0.205 |
| T8 | 83.59 | 4.20 | 0.011 |
| C4 | 13.31 | 0.28 | -0.245 |
| Cz | 13.25 | 0.14 | -0.163 |
| FC2 | 13.28 | 0.28 | -0.263 |
| FC6 | 13.31 | 0.35 | 0.300 |
| F10 | 13.29 | 0.26 | 0.304 |
| F8 | 13.24 | 0.34 | 0.311 |
| F4 | 13.25 | 0.09 | 0.377 |
| Fp2 | 13.11 | 0.48 | 0.292 |
ð SUPRA-SECTION 1: EEG ANALYSIS
Analysis of motor cortex activity during finger tapping task using 4 good EEG channels (C3, C4, F3, F4).
1.0 EEG Power Spectral Density (Preprocessed)
1.0.1 Left Hemisphere PSD by Condition
1.0.2 Right Hemisphere PSD by Condition
Event-Related Desynchronization (ERD) Analysis
Analysis Channel: C3
| Metric | Value | Status |
|---|---|---|
| Alpha ERD (8-13 Hz) | -0.3% (p=0.0500) | â |
| Beta ERD (13-30 Hz) | -0.3% (p=0.0500) | â |
| Beta Rebound (post-task) | 0.6% | â |
Expected Patterns:
- Mu ERD: -20% to -40% during task (motor cortex activation)
- Beta ERD: -30% to -50% during movement
- Beta rebound: +10% to +30% after task cessation
ð§ SUPRA-SECTION 2: fNIRS ANALYSIS
Analysis of hemodynamic response in motor cortex during finger tapping task.
fNIRS Quality Metrics Summary
| Metric | Value |
|---|---|
| Total Channels | 0 |
| Bad Channels | 0 |
| Mean SCI | 0.000 |
| Mean Saturation % | 0.00% |
| Mean Cardiac Power | 0.000 |
| Mean CV % | 0.00% |
Bad Channels Details
â All channels passed quality assessment
Hemodynamic Response Function (HRF) Validation
Analysis Channel: unknown
| Metric | Value | Status |
|---|---|---|
| HbO Onset Time | 0.0s | â |
| Time-to-Peak | 0.0s | â |
| Plateau Amplitude | 0.00 ΞM (p=1.0000) | â |
| Trial Consistency | r=0.00 | â |
Expected Patterns:
- HbO onset: 2-3s post-stimulus (neurovascular delay)
- Time-to-peak: 4-8s for brief stimuli
- Plateau amplitude: Significantly positive (p < 0.05)
- Trial consistency: r > 0.5 indicates reliable response
ð SUPRA-SECTION 3: EEG + fNIRS (MULTIMODAL COUPLING)
Analysis of neurovascular coupling between EEG and fNIRS signals.
Neurovascular Coupling Analysis
| Metric | Value | Status |
|---|---|---|
| Maximum Correlation | r=0.00 | â |
| Optimal Lag | 0.0s | â |
Expected Patterns:
- Negative lag: EEG changes precede HbO changes by 2-5s
- Correlation strength: r > 0.4 indicates adequate coupling
- Interpretation: Neural activity drives hemodynamic response
====================================================================== VALIDATION CRITERIA ASSESSMENT ====================================================================== EEG Analysis (Motor Cortex Activation): ---------------------------------------------------------------------- [FAIL] Alpha ERD significant: -0.3% (p=0.0500) [FAIL] Beta ERD significant: -0.3% (p=0.0500) [FAIL] Beta rebound observed: 0.6% post-task EEG Summary: 0/3 criteria met fNIRS Analysis (Hemodynamic Response): ---------------------------------------------------------------------- [FAIL] HbO onset detected: 0.0s (expected: 2-3s) [FAIL] Time-to-peak plausible: 0.0s (expected: 4-8s) [FAIL] Plateau amplitude significant: 0.00 ΞM (p=1.0000) [FAIL] Trial consistency acceptable: r=0.00 (threshold: >0.5) fNIRS Summary: 0/4 criteria met Neurovascular Coupling: ---------------------------------------------------------------------- [FAIL] EEG precedes fNIRS: lag=0.0s (negative expected) [FAIL] Correlation strength adequate: r=0.00 (threshold: >0.4) Coupling Summary: 0/2 criteria met ====================================================================== OVERALL: 0/9 criteria met (0%) ====================================================================== â RECOMMENDATION: Validation failed. Major issues detected. Significant problems with: - EEG signal quality or task engagement - fNIRS optode coupling or hemodynamic response - Neurovascular coupling strength Recommend troubleshooting before proceeding. Diagnostic Suggestions: ---------------------------------------------------------------------- âĒ Alpha ERD not significant: Check C3 electrode placement, verify subject engaged in task, consider longer task duration âĒ Beta ERD not significant: Verify movement execution, check for excessive muscle artifacts âĒ HbO onset not detected: Check optode coupling (SCI), verify task timing, consider motion artifacts âĒ Plateau amplitude not significant: Check optode placement, verify task difficulty sufficient to elicit response âĒ Unexpected coupling lag: Verify temporal synchronization, check LSL timestamps, review event markers âĒ Weak coupling correlation: May indicate poor signal quality in either EEG or fNIRS, or weak task-related activation
Pipeline Configuration
Configuration parameters used for this analysis:
{
"eeg_enabled": true,
"fnirs_enabled": false,
"eeg_channels_of_interest": [
"C3",
"C4"
],
"trials_per_condition": 12,
"task_duration_sec": 15.0,
"rest_duration_sec": 15.0
}